I'm not sure that I do. That a trust entity can speak, buy & sell, and generate perpetual income? Much like a human?

By the way, the Milton Hershey School is the richest K-12 school in the nation. Chocolate magnate Milton S. Hershey secretly willed the bulk of his fortune to a charitable trust to establish a school (orphanage) 35 years before his death. I think this trust continues to be the single largest shareholder of The Hershey Company.
"Hershey Trust Company is a private trust company founded by Milton S. Hershey in 1905. Hershey Trust Company is wholly owned by the Milton Hershey School Trust, for which Hershey Trust Company is Trustee. In 1909, Milton Hershey created the Milton Hershey School and School Trust and appointed Hershey Trust Company as Trustee of the School Trust. Mr. Hershey established the Milton Hershey School and School Trust to provide full-time education and care for disadvantaged children in perpetuity. The School's original enrollment was 10 students. Today, over 100 years later, Mr. Hershey's legacy continues. The School currently has an enrollment of more than 1,800 students, with an equal mix of boys and girls. Enrollment is expected to grow to 2,000 students in coming years.

Because of Hershey Trust Company's consistent, superior investment management of Milton Hershey's original funding of 486 acres of land and $60 million in Hershey Chocolate Company stock, the assets of the School have grown to a value exceeding $8 billion today."
http://www.hersheytrust.com

Hershey is a fascinating story of failure & success - the Good Millionaire. About 10 years ago I recall a battle over the direction the administrators wished to take the school/trust. Anyway, if you're ever in Pennsylvania I recommend a visit to the Hershey Museum.